earth-circling satellite

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• Satellite — This article is about artificial satellites. For natural satellites, also known as moons, see Natural satellite. For other uses, see Satellite (disambiguation). An animation depicting the orbits of GPS satellites in medium Earth orbit …   Wikipedia

• satellite communication — Introduction  in telecommunication, the use of artificial satellites to provide communications links between various points on Earth (Earth satellite). Communications satellites relay voice, video, and data signals between widely separated fixed… …   Universalium

• satellite — satellited, adj. /sat l uyt /, n. 1. Astron. a natural body that revolves around a planet; a moon. 2. a country under the domination or influence of another. 3. something, as a branch office or an off campus facility of a university, that depends …   Universalium

• earth — /errth/, n. 1. (often cap.) the planet third in order from the sun, having an equatorial diameter of 7926 mi. (12,755 km) and a polar diameter of 7900 mi. (12,714 km), a mean distance from the sun of 92.9 million mi. (149.6 million km), and a… …   Universalium

• Satellite TV — ▪ 1997 by Robert Stoffels       By the end of 1996, several thousand artificial satellites were circling the Earth. About 1,000 of them were in a geosynchronous orbit that is, they were located over the Equator at an altitude of 35,900 km (22,300 …   Universalium

• Defense Meteorological Satellite Program — DMSP images of Auroral bands circling north of Scandinavia The Defense Meteorological Satellite Program (DMSP) monitors meteorological, oceanographic, and solar terrestrial physics for the United States Department of Defense. The program is now… …   Wikipedia

• Other moons of Earth — This article is about the scientific search for other moons of Earth. For Lilith, Earth s second moon in astrology, see Lilith (hypothetical moon). Earth with two moons Claims have existed for many centuries that the Earth might possess other… …   Wikipedia

• OFEQ (Horizon) Satellite —    A long term project intended to provide Israel with an independent space satellite capability. The pace of research and development associated with OFEQ was accelerated in the early 1990s in the context of the reported refusal of the United… …   Historical Dictionary of Israel

• Space Race — For a discussion of all spaceflight programs to date, see History of spaceflight. For a list of key events, see Timeline of space exploration. For other uses of the term, see Space Race (disambiguation). A replica of Sputnik 1, the world s… …   Wikipedia

• Space science — is an all encompassing term that describes all of the various science fields that are concerned with the study of the Universe, generally also meaning excluding the Earth and outside of the Earth s atmosphere . Originally, all of these fields… …   Wikipedia

• Spacecraft magnetometers — Magnetometers are one of the most widely used scientific instruments in exploratory and observation satellites. These instruments were instrumental in the discovery of the Van Allen radiation belts around Earth, discovered on the very first… …   Wikipedia